Hirth Tooth System - Siemens SINUMERIK 840D sl Function Manual

Activating
The functions with equi-distant indexing for an axis (linear axis, modulo rotary axis or rotary
axis) is activated in the following settings
MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB[axis] = 3
16.5.2

Hirth tooth system

Function
With Hirth tooth systems, positions of rotation on a rotary axis are usually interlocked using a
latch or other toothed wheel via a linear axis. The interlock should only be activated when an
indexing position has been reached precisely. The distance between the indexing positions
is the same (equidistant) across the entire circumference.
Requirements
The rotary axis must be an indexing axis. The axis must be referenced.
References:
/FB1/ Function Manual, Basic Functions; Reference Point Approach (R1)
Activation
The following machine data must be set to 1:
MD30505 $MA_HIRTH_IS_ACTIVE
The machine data must be set to 3 (equidistant indexing positions):
MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
T1: Indexing axes
16.5 Equidistant index intervals
955